brilliance vs splendour

brilliance and splendour both are nouns.

Word	Noun	Adjective	Verb	Adverb
brilliance	Yes	No	No	No
splendour	Yes	No	No	No

As nouns, brilliance and splendour are synonyms defined as:

brilliance and splendour: the quality of being magnificent or splendid or grand

Other synonyms of brilliance include grandeur, grandness, magnificence, splendor.

brilliance (noun)	splendour (noun)
a light within the field of vision that is brighter than the brightness to which the eyes are adapted	a quality that outshines the usual
the quality of being magnificent or splendid or grand	the quality of being magnificent or splendid or grand
unusual mental ability